Solution : https://service.sap.com/sap/support/notes/1080893 (SAP Service marketplace login required)
Key words : 
0 - credit management integration - note 01needed manual activities, invoice    oi0_test_oil_cm_old / activate test oil cm, package mcs    oi0_mcs_test   / oil specific test, delivery    oi0_test_oil_cm_inv / activate test oil, version    oi0_test_oil_cm_ord / activate test oil, oi0_test_oil_cm_del / activate test oil, oi0_mcs        / oil specific processing, oi0_sd_vbrk_db / read table vbrk, 0 - credit management integration - note 061069896    1, 0 - credit management integration - note 051064504    1
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